diff --git a/Externals/wxWidgets3/src/generic/tipwin.cpp b/Externals/wxWidgets3/src/generic/tipwin.cpp
index abe66b3275..b022ac3c4f 100644
--- a/Externals/wxWidgets3/src/generic/tipwin.cpp
+++ b/Externals/wxWidgets3/src/generic/tipwin.cpp
@@ -218,6 +218,9 @@ void wxTipWindow::Close()
         *m_windowPtr = NULL;
         m_windowPtr = NULL;
     }
+    // XXX: Dolphin: Prevents an assertion failure due to Close being called multiple times.
+    if (!IsShown())
+        return;
 
 #if wxUSE_POPUPWIN
     Show(false);